瑷 ㄞ ˋ ài 珲 ㄏㄨㄣ ˊ hún 条 ㄊㄧㄠ ˊ tiáo 约 ㄩㄝ yuē 璦 ㄞ ˋ ài 琿 ㄏㄨㄣ ˊ hún 條 ㄊㄧㄠ ˊ tiáo 約 ㄩㄝ yuē Treaty of Aigun, 1858 unequal treaty forced on Qing China by Tsarist Russia